11 25 Pistons with Rings and Pins N63 B44
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2014 BMW Alpina B7L, 2014 BMW Alpina B7, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
PISTONS WITH RINGS AND PINS SPECIFICATION
| Piston and pin are paired to each other - replace together only. | ||
| Measuring point "A" (position) | mm | 10 |
| Piston diameter at measuring point "A" | ||
| Original (new dimension) | mm | 88.985+0.014-0.014 |
| Repair stage (0.08) | mm | 89.065+0.014-0.014 |
| Oversize (0.25) | mm | 89.235+0.014-0.014 |
| Oversize (0.50) | mm | 89.485+0.014-0.014 |
| Piston installation clearance (piston new) | mm | 0.000... 0.034 |
| Piston installation clearance (piston worn) | mm | 0.020... 0.047 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | mm | 0.15 |